The campuses of UCLA and Cal State have ordered the quarantine of people who were exposed to the measles and could not provide evidence that they have been immunized against the disease, Department of Public Health said.

“Both universities are assisting with the implementation of quarantine orders and determining how best to support students who must be quarantined and who live on campus,” the department said.

At Cal State LA, the quarantine is related to a measles exposure at a library on April 11. The quarantine initially affected about 200 employees, including some student-employees, the university said in a statement.

That number was later reduced to 156 people, the Department of Public Health said in an email on Thursday, and the quarantine will end in a week.

At UCLA, 119 students and eight staff members who were exposed to measles at the campus earlier this month and could not provide proof of immunity were ordered quarantined on Wednesday, the university said in a statement.

Since then, officials have released more than 40 people from the quarantine after establishing they had immunity. The UCLA quarantine will end by Tuesday..

A total of 695 cases of measles have been exposed in the US, according to the Centers for Disease Control and Prevention. Many of the case occurred in the states of New York and Washington.